中国物理B ›› 2006, Vol. 15 ›› Issue (5): 1009-1014.doi: 10.1088/1009-1963/15/5/024

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Mechanical model study of relationship of molecular configuration and multiphase in liquid crystal materials

李振新1, 马恒2, 孙瑞芝2   

  1. (1)Biomedical Materials and Engineering Centre, Wuhan University of Technology, Wuhan 430070, China; (2)College of Physics & Engineering Information, Henan Normal University, Xinxiang 453007, China
  • 收稿日期:2005-12-20 修回日期:2005-12-30 出版日期:2006-05-20 发布日期:2006-05-20
  • 基金资助:
    Project supported by the Henan Innovation Project for University Prominent Research Talents, China (Grant No 2006KYCX002).

Mechanical model study of relationship of molecular configuration and multiphase in liquid crystal materials

Ma Heng (马恒)a, Sun Rui-Zhi (孙瑞芝)a, Li Zhen-Xin (李振新)b    

  1. a College of Physics & Engineering Information, Henan Normal University, Xinxiang 453007, China; b Biomedical Materials and Engineering Centre, Wuhan University of Technology, Wuhan 430070, China
  • Received:2005-12-20 Revised:2005-12-30 Online:2006-05-20 Published:2006-05-20
  • Supported by:
    Project supported by the Henan Innovation Project for University Prominent Research Talents, China (Grant No 2006KYCX002).

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摘要： A mechanical model of liquid crystals (LCs) is applied to study the polymorphism of homologous series of terphenyl compounds. With a semi-experimental molecular orbit method, we calculate the moment of inertia which represents the rotation state to describe the phase transition temperature obtained from experimental data. We propose a novel explanation of the phase sequence or polymorphism of LC materials using the two key parameters, the moment of inertia and critical rotational velocity. The effect of molecular polarity on the appearance of liquid crystalline is also discussed.

关键词: mechanical model, liquid crystal, multi-phase, moment of inertia

Abstract: A mechanical model of liquid crystals (LCs) is applied to study the polymorphism of homologous series of terphenyl compounds. With a semi-experimental molecular orbit method, we calculate the moment of inertia which represents the rotation state to describe the phase transition temperature obtained from experimental data. We propose a novel explanation of the phase sequence or polymorphism of LC materials using the two key parameters, the moment of inertia and critical rotational velocity. The effect of molecular polarity on the appearance of liquid crystalline is also discussed.

Key words: mechanical model, liquid crystal, multi-phase, moment of inertia

中图分类号:  (Molecular and microscopic models and theories of liquid crystal structure)

  • 61.30.Cz
61.30.Vx (Polymer liquid crystals) 64.70.M- (Transitions in liquid crystals)